Skip to main content
Featured Image for LP255

A German-made reciprocating triplex plunger pump.

Spheroidal cast iron crankcase with sight glass and vented dipstick; forged, through-hardened, ground and polished crankshaft; bronze connecting rods; hardened stainless steel plunger bases; solid ceramic plungers; nitrile seals with fabric reinforcing; stainless steel valves and forged brass manifold.

WARNING: This product might contain a chemical known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information go to

Specification US Metric
Flow25.7 GPM97.3 L/min
Maximum Discharge Pressure2175 PSI150 bar
Crankshaft Speed1000 RPM
Power39.3 HP29.3 KW
Max Temperature140 °F60 °C
Inlet Port Size(2) 1-1/2" NPT
Discharge Port Size(2) 1" NPT
Plunger Diameter1.26 in.32 mm
Stroke1.65 in.42 mm
Maximum Inlet Pressure90 PSI6.2 bar
Crankshaft Diameter1.38 in.35 mm
Crankshaft RotationTop of Pulley Towards Manifold
Crankshaft MountingEither Side
Crankcase Oil Capacity US118 fl. oz. 3.5 L
Weight125 lbs.57 kg
Volumetric Efficiency0.96
Mechanical Efficiency0.85
Manifold Material Brass
Crankcase Material Spheroidal Cast Iron
Plunger Material Solid Ceramic Oxide
Valve Material Stainless Steel
Seal Material Nitrile with Fabric Reinforcing
The repair kits listed to the right are available for this pump. If you need further information about these repair kits, or have questions about other specific parts for your pump, please contact you local Giant distributor or contact Giant customer service.
Plunger Packing Kit – Part #09535
35A 07740 O-Ring 3
35B 13141 O-Ring 3
36 13025 V-Sleeve weep 3
40 13027 V-Sleeve 6
Valve Assembly Kit – Part #09136
46A 07751 Valve Assembly Complete 3
48A 12055 O-Ring 3
Oil Seal Kit – Part #09577
31 07133 Radial Shaft Seal 3

Horsepower Specifications

RPM GPM 1000 PSI 1500 PSI 2000 PSI 2175 PSI
500 13 9.0 13.5 18.1 19.6
640 16.6 11.5 17.3 23.1 25.1
750 19.5 13.5 20.3 27.1 29.5
805 20.9 14.5 21.8 29.0 31.6
865 22.5 15.6 23.4 31.3 34.0
920 23.9 16.6 24.9 33.2 36.1
1000 26 18.1 27.1 36.1 39.3

Images Open in new Window/Tab

  • Dimensional Drawing (Side) Open
  • Dimensional Drawing (Front) Open
  • LP255 Exploded View
  • LP255 Parts List
  • LP255 Torque Specifications


Documents open in new window/tab.

  • Giant Industries Limited Warranty
  • LP255 Installation Instructions
  • LP255 Repair Instructions
  • Troubleshooting Guide

Sample Pump

Our Company

For 50 years, Giant Pumps has offered the most dependable positive displacement high-pressure triplex pumps available. Designed and built to the highest quality standards, customers count on Giant Pumps products to keep their equipment running. Every design detail of Giant Pumps products is optimized for long-life and reliable performance, making Giant Pumps the most trusted name in high-pressure pumps and systems.

Learn More

Join Our Newsletter

Get the latest updates from Giant Pumps delivered right to your inbox!

Subscribe to the Giant Newsletter

Back to Top